Electromotive-force regulator.



No. 740,147. PATENTED SEPT. 29, 1903'.

B. G. LAMME. BLBGTROMOTIVE FORGE REGULATOR.

APPLIOATIOI IILED OOT. 2- 1902.

no noun. a sums-sum 1.

WITNESSES: /N VENTUR- 4 UNITED STATES fatented Sieptember 2&5, i903.

PATENT OFFICE.

BENJAMIN G. LAMME, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR TO WEST-INGHOUSE ELECTRIC & MANUFACTURING COMPANY, A CORPORATION onPENNSYLVANIA.

ELECTROMOTNE-FORCE REGULATOR.

SPECIFICATION forming part of LettersPatent No. 740,147, dated.September 29, 1903.

Application fled October 2, 1902- Serial No. 125,716. (No model.) A

To rtZZ whom it may concern:

Be it known that I, BENJAMIN G. LAMME,

a citizen of the United States, anda resident of Pittsburg, in thecounty of Allegheny and State of Pennsylvania, have invented a new anduseful Improvement in Electromotive- Force Regulators, of which thefollowing is a specification.

My invention relates to apparatus for raisro ing and lowering theelectromotive force of alternating-current circuits, and particularly tosuch apparatus as varies the electromotive force by inductive actionbetween a primary and a secondary member, which are relatively movableso as to change the polar relations.

The object of my invention is to provide an induction voltage-regulatorof compact and durable construction which shall be thor- 2o oughlyventilated so as to keep the temperature within satisfactory limits andin which the noise due to the current alternations shall be reduced to aminimum.

My invention is illustrated in the accompanying drawings, in whichFigure 1 is a central longitudinal section of the regulator, and Fig. 2is a diagram of the windings of the primary member.

The operating parts of the regulator are in- 0 closed within a casing 1,which, as shown, is cylindrical in form and has a removable cap or topportion 2, provided with comparatively large ports or openings 3, and ahollow base 4, provided with openings or ports 5 in its bottom and witha series of ports 6 in its periphery. The base 4 is also provided with astep-bearing 7 for a hollow shaft 80f the rotating member 9 of theregulator, which member comprises a hollow drum 10, (here shown asconstituting an integral part of the shaft,) and with a laminated core11,- provided with horizontal ventilating-ducts 12, which communicatewith an annular chamber or passage 13, located between said core and theperiphery of the drum 10. The shell of the drum at or near its lower endis provided with ports or openings 14, through which air is admitted tothe chamber 13 and to which the air is supplied through the ports 5, thechamber formed by the hollow base 4, ports from through lateral openings26.

6, and a chamber 15, into which the ports 6 open and which is also inopen communication with the ports 14 through the lower port of the drum10. The base 4 is also provided with an annular cup 16, from the bottomof which a pipe 17 leads to the exterior of the casing. At the upper endof the drum 10 the shaft 8 is provided with a cup 18, from the bottom ofwhich a pipe 19 leads to the cup 16, these parts being provided in orderto collect and remove from the apparatus any liquid which may be formedby condensation or otherwise collected in either ofthe cups 16 and 18.The'movable member ofthe regulator is provided with coils 20, which are10- cated in slots in the core 11 and project, respectively, therefromconsiderable distances into the chamber 15 at the bottom of theregulator and into a corresponding chamber 21 at or near the upper endof the casing, the ports 3 being the outlet-ports from the chamber 21.The stationary core 22 surrounds the movable core 11 and is in suchclose proximity to the latter as to leave a very small air-gap. Thiscore is also provided with ventilatingducts 23, which correspond to theducts 12 in the core 11. The coils 24, constituting the winding of thestationary member, are also located in slots in the core and project,respectively, into the chambers 15 and 21. The conducting-leads betweenthe winding of the movable member and the external circuits are in theform of cables 25 and extend inward through the hollow shaft 8 andthere- The connections of the stationary winding with the externalconductors 27 are made by means of a terminal board 28 on the outside ofthe easing and a set of annular strap-conductors 29 in the upper part ofthe casing, between which and the terminal board extendsuitablecouplings 30 and strap-leads 31. The movable member is given itsmotion of partial rotation necessary for raising and lowering theelectromotive force of the circuit in which it is used by means of anelectric motor 32, preferably of the polyphase induction'type, the shaftof which operates the shaft 8 through the medium of suitableworm-gearing 33.

The construction and arrangement of the casing and cores as abovedescribed are such as to provide admirable ventilation, and-thus keepthe temperature sufficiently low for satisfactory operation, and therelative location of the cores of the primary and secondary members issuch that a minimum air-gap is provided between them which tends toeliminate the noise ordinarily produced by alternating currents whenacting upon laminated structures. This tendency to noisy operation isalso further obviated by the arrangement of the windings of one or bothof the members, that shown in Fig.2 being the winding of the primary orstationary member of the device or apparatus and being, as shown,arranged and connected for an eight pole winding supplied with six-phasecurrents, the external leads for the several phases being represented at34:, 35, 36, 37, 38, and 39 and each phase being supplied to the winding24 by conductors 29 and suitable branch conductors leading therefrom.The arrangement and connections are clearly indicated as such that thewinding for each phase produces eight magnetic poles and the phases sooverlap each other as to make a uniformly-distributed field, andtherefore provide magnetic circuits that are so equalized as tosubstantially eliminate or very materially reduce the humming whichresults from unbalanced magnetic circuits in apparatus of thischaracter. My invention is of course not limited to the number of phasesof current supplied to the apparatus or to the number of poles producedtherein; neither is it limited to the mechanical details as regardseither form, dimensions, or relative location of parts except in so faras limitations may be imposed by the prior art.

I claim as my invention 1. Aninduction-regulatorcomprisingacasing havingventilating-passages, a stationary core supported by said casing andhaving ventilating-ducts, a rotatable member having a core provided withventilating-ducts'and located in close proximity to said stationarycore, windings located in slots in the respective cores and projectinginto the ventilatingpassages in the casing and means for actuating therotatable member.

2. An induction-regulator supplied with polyphase currents and at leastone of its members having a plurality of parallel circuits for eachphase and for each pole whereby the magnetic circuits are equalized.

3. An induction regulator supplied with polyphase currents and one ofthe members of which has its windings distributed and connected so thateach phase of current traverses a plurality of conductors correspondingto each pole, in parallel.

4. Aninduction-regulatorhaving cores provided with longitudinal slotsand transverse ventilating-ducts and with coils located-in thecore-slots and projecting beyond their ends, in combination with acasing having ventilating-passages into which the coil ends project atboth ends of the cores.

5. An inductionregulator having relatively movable, concentriccylindrical cores in close proximity to each other and provided withventilating-ducts, coils located in slots in said cores and projectingbeyond the ends thereof and a casing having air-conducting passages intowhich said coils project.

In testimony whereof I have hereunto subscribed my name this 25th day ofSeptember, 1902.

BENJ. G. LAMME.

Witnesses:

JAMES 13. YOUNG, BIRNEY HINES.

